Locking and automatic tightening device for conoidal mounts.



J. E. KENNE'D LOCKING AND AUTOMATIC TIGHTENING DE CONOIDAL MOUNTS.

APPLICATION FILED MAR. 4. 9

1,281,395.. Patented 00t.15, 8-.

ZSHEETS-S HEE I.

J. E. KENNEDY.

LOCKING AND AUTOMATIC nemmws DEVICE FOR CONOIDAL MOUNTS.

APPLICATION FILED MAR. 4. l9l8- Patented 001;. 15, 1918.

2 SHEETSSHEET 2.

I 0 2 5 Sel d c E 2. i c,

:jii'jjj: g z

%3 Z2 glitz-2:35??? ATENT -FFT@E.

JOSEPH E. KENNEDY, OF NEW YORK, N. Y.

LOCKING AND AUTOMATIC TIGHTENING DEVICE FOR CONOIDAL MOUNTS.

Specification of Letters Patent.

Patented Oct. 15,- 1918.

Application filed March 4, 1918. Serial No. 220,199.

To all whom it may concern:

Be it known that I, JOSEPH E. KENNEDY, a citizen of the United States, and a resident of the borough of Manhattan, city,

county, and State of New York,-have m- 'vented certain new and useful Improvements in Looking and Automatic Tightening Devices for Conoidal vMounts, of which the following is a specification.

My improvements relate to the'method of securing conoidal mounts on tapered contactual surfaces as set forth in Letters Patent No. 1,231,744, issued to me July 3, 1917,

in which the distinctive feature is the avoidance of the direct threading of the shaft by the substitution of a peripherally threaded sleeve attached thereto, and the use in conjunction with said threaded sleeve of a nut engaging therewith and bearing against the head or work member,the objects and advantages attained by said automatic tightening means being fully set forth in said Letters Patent, to which reference maybe had .as disclosing the state-of the art prior to my present invention, which appertains more particularly to the means provided for rigidly securing the aforesaid peripherally threaded sleeve to theshaft.

In other words by my present invention I dispense with the gib keys and key blocks shown in said Letters Patent as a means of affixing the peripherally threaded sleeve to the shaft, and substitute in lieu thereof a split collar and dowels as hereinafter described and claimed specifically,not because the gib keys and key blocks referred to do not answer the purpose effectually, but because I wish to avoid the necessity for grooving the shaft longitudinally in several places for the seating of the gib keys and key blocks, and also because my object is to afford simpler means of attachment, and to reinforce the locking and automatic ti htening device against excessive strain to which it may be subjected under certain conditions of use.

In the accompanying drawings,

Figure 1, is a transverse section of a gymtory crusher shaft taken above the work head, of which a top view is shown, partly broken away;

Fig. 2, shows the shaft in sectional elevation, and a central longitudinal section of a one piece work head of chilled iron;

Fig. 3, is a view similar to Fig. 2, showing the work head formed of a cast iron core and manganese steel mantle;

Fig. 4, is a perspective view of the malethread sleeve;

Fig. 5, is a perspective view of the split collar used in securing the male threaded sleeve to the shaft.

The gyratory shaft S, is formed with the usual convexo-conoidal seat section 8, above the smaller upper diameter of which the shaft is formed with the cylindrical zone 8, for the reception of the peripherally threaded male-screw sleeve M. Above and adjoining the cylindrical zone 8, for the seating of the male-screw sleeve M, I form the shaft with another cylindrical zone 8 which may be of reduced diameter, although not necessarily so,the essential feature in this respect being the formation of this section of the shaft S, with the annular shoulder 8 The cylindrical zone 8 is for the seating of the split collar 0, and the annular shoulder s is to limit and sustain the split collar G. when properly positioned on the shaft S.. This shoulder 8 sustains the whole brunt of the upward strain, and being annular afiords ample support for the split collar C, with the upper side of which it contacts.

The collar C, is coupled to the shaft S, by dowel pins 0?, (Z, fitting in recesses c, c, in the collar sections C, C, and into corresponding recesses 8 s. in the shaft S. as

shown particularly in Fig. 2', and in like manner the collar sections C. C, are coupled to the peripherally threaded sleeve M, by means of dowel pins 0?. (Z.

The sections C, C. of the split collar C, are secured together by bolts 6, and nuts 6', as indicated in Figs. 1 and 5. or by any other well known mechanical expedient.

As a result of this method of dowel coupling between the parts named it is obvious that the male-threaded sleeve M. will be positively held in position on the shaft S.

The nut N. is preferably although not necessarily attached to the work head H, by means of peripheral protuberances n, a, seated in corresponding recesses k, h, in the head, as shown more particularly in Fig. 1,the annular space between the nut and the head being filled with zinc, z.

The work head H, is formed with a concavo-conoidal inner surface h, for seating upon the convexo-conoidal surface s, of the shaft, a lining a, of zinc being interposed between them in the usual way. In Fig. 2, a. one piece head of chilled iron is shown, and the nut N, is set directly therein as above indicated, while in Fig. 3, the head consists of a conoidal cast iron core, and a conoidal mantle it of manganese steel in the upper edge of which the nut N, is set as before stated,z beingthe zinc lining usually interposed between the core W, and the mantle 72. In either case the result is the same in that the strain of work, acting through the male-thread-sleeve M, causes the nut to tighten the head upon its seat, provided of course that the direction of rot-ation is right hand for a left-hand-screwthreaded sleeve M, and left handed fora right-hand-threaded sleeve M, as hereinbefore indicated.

Itis to be noted that otherwise than for the two dowel recesses .9 s, the shaft is intact peripherally in so far as conoidal mount and lockis concerned, and as these recesses are diametrically opposed to each other their tendency to weaken the shaft is reduced to the minimum. Furthermore my present construction and arrangement of interlocking parts is simpler than heretofore, and much better adapted to sustain extraordinary work strain.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a mount of the character designated, the combination of a shaft formed with a convexo-conoidal seat section and with an unthreaded portion adjacent to the lesser diameter of said convexo-conoidal seat section, and also formed with an essentially annular shoulder adjoining said unthreaded portion,

the combination of a shaft formed with a A convexo-conoidal seat section and with an unthreaded portion adjacent to the lesser .diameter of said convexo-concoidal seat section, and also formed with an essentially annular shoulder adjoining said unthreaded portion, a work member formed with a con cavo-conoidal surface contacting with said convexo-conoidal seat section of the shaft, a

peripherally threaded sleeve seated on said unthreaded portion of the shaft, a split col lar fitting said unthreaded portion of the shaft, interlocking parts connecting the sec tions of said split collar positively with the shaft and with said peripherally threaded sleeve, and a nut engaging said peripherally,

threaded sleeve and bearlng against said seated work member, said interlocking parts consisting of dowel pins fitting in sockets formed for their reception in the said shaft, split collar sections, and peripherally threaded sleeve, for the purposedescribed.

' JOSEPH E. KENNEDY. Witnesses: DOROTHY MIATT, GEO. WM. MIATT. 

